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Submission #987222

# Submission time Handle Problem Language Result Execution time Memory
987222 2024-05-22T11:05:53 Z Ghetto Sails (IOI07_sails) C++17
55 / 100
 54 ms 2244 KB 
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
const int MAX_H = 1e5 + 5;
const lint INF = 3e18;

int n;
vector<int> hs;
lint s;

int w[MAX_H];
void precomp() {
    for (int h = 1; h <= 1e5; h++) {
        int i = lower_bound(hs.begin(), hs.end(), h) - hs.begin();
        w[h] = n - i;
    }
}

int main() {
    // freopen("sails.in", "r", stdin), freopen("sails.out", "w", stdout);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        int h; cin >> h;
        hs.push_back(h);
        lint new_s; cin >> new_s;
        s += new_s;
    }
    sort(hs.begin(), hs.end());

    precomp();
    auto consec_sum = [] (lint x) { return x * (x + 1) / 2; };
    lint ans = INF, sum = 0;
    for (int h = 1e5; h >= 1; h--) {
        if (s <= h * (lint) w[h]) {
            lint new_ans = sum + h * consec_sum(s / h - 1) + (s / h) * (s % h);
            ans = min(ans, new_ans);
        }
        s -= w[h], sum += consec_sum(w[h] - 1);
        if (s < 0) break;
    }
    cout << ans << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 860 KB Output is correct
2 Correct 2 ms 604 KB Output is correct

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 856 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 1368 KB Output is correct

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 1484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 37 ms 1996 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2104 KB Output is correct
2 Correct 34 ms 1936 KB Output is correct

Subtask #11
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 2244 KB Output isn't correct
2 Halted 0 ms 0 KB -